Home pregnancy tests are accurate to the extent they can be. How accurately they are used also affects the results.
Some tests indicate you are to use your first urine in the am which would contain the strongest content of pregnancy hormone...But you may have gotten up at 4:30 in the morning to go to the bathroom, then tested at 7:00 in the morning.
If your fingers touch the pad where you are to test the urine, that may affect the accuracy.
You may be testing too soon to tell.
You may think you see the "pink circle" or the "double lines" or the "check mark" indicating a positive result...
Lots of factors come in to play.